<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://cdn.bootcdn.net/ajax/libs/vue/2.6.14/vue.js"></script>
</head>
<body>
    <div id='app'>{{msg}}</div>
    <script>
        let vm=new Vue({
            el:'#app',
            data:{
                msg:'456'
            },
            // template:`<div id='app'>5555{{msg}}</div>`,
            render(h){
                return  h('div',{class:'box'},this._data.msg)
            }
        })
        debugger

        Vue.component('dd',{template:'ddd'})
        console.log(vm)
    </script>
</body>
</html>